JPS5538693A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5538693A
JPS5538693A JP11332078A JP11332078A JPS5538693A JP S5538693 A JPS5538693 A JP S5538693A JP 11332078 A JP11332078 A JP 11332078A JP 11332078 A JP11332078 A JP 11332078A JP S5538693 A JPS5538693 A JP S5538693A
Authority
JP
Japan
Prior art keywords
binder
molecular weight
ferromagnetic powder
recording medium
diol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11332078A
Other languages
Japanese (ja)
Other versions
JPS6118809B2 (en
Inventor
Yuzo Ozaki
Jiyunji Nanba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to JP11332078A priority Critical patent/JPS5538693A/en
Publication of JPS5538693A publication Critical patent/JPS5538693A/en
Publication of JPS6118809B2 publication Critical patent/JPS6118809B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)

Abstract

PURPOSE: To improve both resistance to wear and electromagnetic conversion characteristics by specific polyurethane as a binder for ferromagnetic powder.
CONSTITUTION: A multifunction hydroxy compound of 500W3000 in molecular weight such as polyester polyol, short chain diol of less than 500 in molecular weight such as 1,4-butanediol, a 2 or 3-functional isocyanate compound such as 4,4- diphenylmethane diisocyanate, and diol expressed by formula I or II (R1 is alkylene of C2-6; R2 is alkyl of C1-5, H; R3 is organic remaining radical; M is alkaline metals; [m] is between 1W3) are heated to react under the reflux of appropriate solvent. In this way, polyurethane whose SO3M radical content is an equivalent of 0.005W2.0m per polymer is used as a binder to obtain magnetic paint with dispersed ferromagnetic powder, and a non-magnetic supporting material is coated with it.
COPYRIGHT: (C)1980,JPO&Japio
JP11332078A 1978-09-13 1978-09-13 Magnetic recording medium Granted JPS5538693A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11332078A JPS5538693A (en) 1978-09-13 1978-09-13 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11332078A JPS5538693A (en) 1978-09-13 1978-09-13 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5538693A true JPS5538693A (en) 1980-03-18
JPS6118809B2 JPS6118809B2 (en) 1986-05-14

Family

ID=14609236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11332078A Granted JPS5538693A (en) 1978-09-13 1978-09-13 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5538693A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56167770A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167771A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167769A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167768A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167772A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS5740743A (en) * 1980-08-23 1982-03-06 Sony Corp Magnetic recording medium
JPS5744227A (en) * 1980-08-30 1982-03-12 Sony Corp Magnetic recording medium
JPS5792422A (en) * 1980-11-25 1982-06-09 Sony Corp Magnetic recording medium
JPS57113420A (en) * 1980-12-29 1982-07-14 Sony Corp Magnetic recording medium
JPS57158016A (en) * 1981-03-20 1982-09-29 Hitachi Maxell Ltd Magnetic recording medium
WO1983000696A1 (en) * 1981-08-19 1983-03-03 Miyai, Seiichi Electron beam-curable resin
JPS5891524A (en) * 1981-11-24 1983-05-31 Hitachi Maxell Ltd Magnetic recording medium
JPS58115629A (en) * 1981-12-28 1983-07-09 Fuji Photo Film Co Ltd Magnetic recording medium
JPS6015473A (en) * 1983-07-06 1985-01-26 Toyo Tire & Rubber Co Ltd Magnetic paint
JPS6195531A (en) * 1984-10-16 1986-05-14 Meidensha Electric Mfg Co Ltd Forming method of bevel structure of semiconductor element
US7514139B2 (en) * 2002-04-30 2009-04-07 Sanyo Chemical Industries, Ltd. Polyol component for polyurethane formation comprising anionic diol and composition

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56167771A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167769A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167768A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167772A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS56167770A (en) * 1980-05-29 1981-12-23 Matsushita Electric Ind Co Ltd Preparation of magnetic paint
JPS5740743A (en) * 1980-08-23 1982-03-06 Sony Corp Magnetic recording medium
JPS6346489B2 (en) * 1980-08-23 1988-09-16 Sony Corp
JPS639296B2 (en) * 1980-08-30 1988-02-26 Sony Corp
JPS5744227A (en) * 1980-08-30 1982-03-12 Sony Corp Magnetic recording medium
JPS5792422A (en) * 1980-11-25 1982-06-09 Sony Corp Magnetic recording medium
JPS6346886B2 (en) * 1980-11-25 1988-09-19 Sony Corp
JPS6346887B2 (en) * 1980-12-29 1988-09-19 Sony Corp
JPS57113420A (en) * 1980-12-29 1982-07-14 Sony Corp Magnetic recording medium
JPS57158016A (en) * 1981-03-20 1982-09-29 Hitachi Maxell Ltd Magnetic recording medium
JPH0370286B2 (en) * 1981-03-20 1991-11-07 Hitachi Maxell
WO1983000696A1 (en) * 1981-08-19 1983-03-03 Miyai, Seiichi Electron beam-curable resin
JPS5891524A (en) * 1981-11-24 1983-05-31 Hitachi Maxell Ltd Magnetic recording medium
JPH0449168B2 (en) * 1981-11-24 1992-08-10 Hitachi Maxell
JPS58115629A (en) * 1981-12-28 1983-07-09 Fuji Photo Film Co Ltd Magnetic recording medium
JPH036571B2 (en) * 1981-12-28 1991-01-30 Fuji Photo Film Co Ltd
JPS6015473A (en) * 1983-07-06 1985-01-26 Toyo Tire & Rubber Co Ltd Magnetic paint
JPS6358870B2 (en) * 1983-07-06 1988-11-17
JPS6195531A (en) * 1984-10-16 1986-05-14 Meidensha Electric Mfg Co Ltd Forming method of bevel structure of semiconductor element
US7514139B2 (en) * 2002-04-30 2009-04-07 Sanyo Chemical Industries, Ltd. Polyol component for polyurethane formation comprising anionic diol and composition

Also Published As

Publication number Publication date
JPS6118809B2 (en) 1986-05-14

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